KNOWN_BUGS: build for iOS simulator on macOS 13.2 with Xcode 14

Closes #11215

docs/KNOWN_BUGS

@@ -39,6 +39,7 @@ problems may have been fixed or changed somewhat since this was written.
  5.1 OS400 port requires deprecated IBM library
  5.2 curl-config --libs contains private details
  5.3 building for old macOS fails with gcc
+ 5.4 build for iOS simulator on macOS 13.2 with Xcode 14
  5.5 cannot handle Unicode arguments in non-Unicode builds on Windows
  5.9 Utilize Requires.private directives in libcurl.pc
  5.11 configure --with-gssapi with Heimdal is ignored on macOS
@@ -236,6 +237,10 @@ problems may have been fixed or changed somewhat since this was written.
 
  See https://github.com/curl/curl/issues/11441
 
+5.4 build for iOS simulator on macOS 13.2 with Xcode 14
+
+ https://github.com/curl/curl/issues/11215
+
 5.5 cannot handle Unicode arguments in non-Unicode builds on Windows
 
  If a URL or filename cannot be encoded using the user's current codepage then